Name: cl2.jpgViews: 4022Size: 32.4 KB

Name: cl2.jpgViews: 4022Size: 32.4 KB

20 Inch Smoothie Wheels - One of the wheels can be described as circular component that is supposed to rotate with an axle bearing. The wheel is one of the primary aspects of the wheel and axle which is probably the six simple machines. Wheels, together axles, allow heavy objects to generally be moved easily facilitating movement or transportation while supporting a load, or performing labor in machines. Wheels may also be employed for other purposes, for instance a ship's wheel, controls, potter's wheel and flywheel.Common examples are merely in transport applications. A wheel greatly reduces friction by facilitating motion by rolling together with the use of axles. To ensure that wheels to rotate, a short while must apply to the wheel about its axis, either by gravity or by the usage of another external force or torque.The English word wheel proceeds from the Old English word hweol, hweogol, from Proto-Germanic *hwehwlan, *hwegwlan, from Proto-Indo-European *kwekwlo-, a prolonged kind of the cause *kwel- "to revolve, move around ".Cognates within Indo-European include Icelandic hjól "wheel, tyre", Greek κύκλος kúklos, and Sanskrit chakra, the latter both meaning "circle" or "wheel ".Precursors of wheels, often called "tournettes" or "slow wheels", were known in your Middle East by the 5th millennium BCE (one of the first examples was discovered at Tepe Pardis, Iran, and dated to 5200–4700 BCE). These people were made of stone or clay and secured to the ground having peg during the center, but required effort to turn. True (freely-spinning) potter's wheels were apparently in use in Mesopotamia by 3500 BCE and possibly as soon as 4000 BCE, together with the oldest surviving example, sega's included in Ur (modern day Iraq), dates to approximately 3100 BCE.


The primary proof wheeled vehicles appears within the last half for the 4th millennium BCE, near-simultaneously in Mesopotamia (Sumerian civilization), the Northern Caucasus (Maykop culture) and Central Europe (Cucuteni-Trypillian culture), so the question of which culture originally invented the wheeled vehicle continues to be unsolved.The primary well-dated depiction of your wheeled vehicle (here a wagon — four wheels, two axles) is at the Bronocice pot, a c. 3500 – 3350 BCE clay pot excavated in any Funnelbeaker culture settlement in southern Poland.The oldest securely dated real wheel-axle combination, that from Stare Gmajne near Ljubljana in Slovenia (Ljubljana Marshes Wooden Wheel) is right now dated in 2σ-limits to 3340–3030 BCE, the axle to 3360–3045 BCE.Two types of early Neolithic European wheel and axle are known; a circumalpine particular wagon construction (the wheel and axle rotate together, like for example Ljubljana Marshes Wheel), and with the Baden culture in Hungary (axle won't rotate). They both are dated to c. 3200–3000 BCE.In China, the wheel was certainly present using the adoption on the chariot in c. 1200 BCE,although Barbieri-Low[9] argues for earlier Chinese wheeled vehicles, c. 2000 BC.

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IMAGE URL:	http://www.pro-touring.com/attachment.php?attachmentid=43595&d=1294641085
THUMBNAIL:	https://tse3.mm.bing.net/th?id=OIP.8SQetm98y4YiMVZvI1JMowEsEY&pid=Api&w=192&h=181
IMAGE SIZE:	33217 B Bs
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SOURCE DOMAIN:	pro-touring.com
SOURCE URL:	http://www.pro-touring.com/threads/76043-Centerline-Wheels
THUMBNAIL WIDTH:	192
THUMBNAIL HEIGHT:	181

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